Comment by gdevic

There is a WebAssembly version running online here, with and without debugger panel:

https://baltazarstudios.com/files/calculator-d/Calculator.ht...

https://baltazarstudios.com/files/calculator/Calculator.html

This WebAsm code is compiled using Qt and Verilator so it runs the "hardware" and its microcode inside the simple UI shell that provides the calc interface. In the debug version you can list the ucode, set breakpoints, see regs etc.